This Research Handbook explores the complex interplay between competition law and sustainability, and also provides key insights into the role and limitations that tax, environmental laws, consumer laws, and social laws have in promoting sustainability. A distinguished array of international experts examine core principles of environmental and social sustainability, delve into the economic dynamics that shape this multidimensional relationship, and critically analyse how competition law and policy can both positively and negatively shape sustainability outcomes. The Research Handbook presents a detailed overview of various policy questions surrounding sustainability and antitrust law – considering their economic, legal, and institutional aspects – and includes diverse jurisdictional perspectives which highlight the many nuances in this increasingly relevant interface. The Research Handbook on Sustainability and Competition Law is an essential resource for academics, researchers, and students of competition and antitrust law and environmental law. Its in-depth exploration of economic analysis, policy perspectives, and different legal avenues also make it an invaluable resource for legal professionals, policymakers, and government officials.